Leather-edge-finishing machine and method therefor



F. W. MEHRICK.

LEATHER EDGE FINISHING MACHINE AND METHOD THEREFOR.

APPLICATION EILED JAN. 2, I920.

Patented May 11, 1920.

2 SHEETSSHEET I.

fnvgnzor' 5; (w. SWAMCXL 5y Q QW ii/for-ney- F. W. MERRICK.

LEATHEREDGE FINISHING MACHINE AND METHOD THEREFOR.

APPLICATION FILED JAN. 2, I920.

Patented May 11, 1920.

2 SHEETS -SHEET 2- fnventa r' I Wfifarne y UNITED STATES PATENT OFFICE.

FRANK W. MERRICK, 013 BOSTON, IVIASSAGHUSETTS.

LEATHER-EDGE-FINISHING MACHINE AND METHOD THEREFOR.

Application filed January 2, 1920.

To all whom it may concern:

Be it known that I, FRANK WV. Mnnnion, a citizen of the United States, residing at Boston, in the county of Suffolk, State of Massachusetts, have inven ed a certain new and useful Improvement in Leather-Edge- Finishing Machines and Methods There-for, of which the following is a specification, reference being had therein to the accompanying drawings.

The invention relatesv to machines for finishing the cut edges of upper leather and the like, and to the art of finishing such edges. More particularly, it relates to leather-edge finishing machines of the class designed to secure the desired results by a burnishing action, and to the method of performing the er. ge-burnishing.

So far as I am aware, the machines which heretofore have been proposed for use in finishing the cut edges of upper leather and the like have been unsuccessful; the results of their operation in practice have not been satisfactory.

A special object of the invention is to enable edge-burnishing to be effected successfully and expeditiously, with satisfactory results, upon the cut edges of thin and flexible leather, and of soft spongy leather, both of which characters of leather present serious difiiculties to the attainment of satisfac-v tory results in machine edge-burnishing on practical scale. For instance, in th case of thin and flexible leather, the action of a burnishing tool against a cut edge tends to turn or deflect the latter. In the case of soft, spongy leatheigthe pressure of the tool against a cut edge tends to thicken or splay out the edge. In either case, the burnishing operation as performed heretofore has produced an imperfectly finished and usually deformed edge. In addition, the burnishing operation as heretofore performed has produced a stretching and lengthening of the edge of the leather, so that the excess length thereof renders it wavy and results in the formation of flutes, wrinkles. and the like.

The diiliculties mentioned above, and others metwith in practice, and the unsatisfactory results, have led to omission of edge-burnishing operations, and in some instances to the following of procedure involvingthe skiving, cementing, and folding over of the marginal portion at the cut edge Specification of Letters Patent.

Patented May 11, 1920.

Serial No. 348,980.

of a piece of leather, which is the method of finishing cut edges most generally followed in practice.

Devices embodying and operating in conformity with the principles of the present invention are free from the tendencies inherent in prior machines to stretch, thicken,

or turn back the edge operated upon, or otherwise render the edge imperfect. They produce an edge of improved and superior finish, closely resembling in appearance the grain or finished side of the leather.

The essential features of leather-edge burnishing devices embodying the principles of the invention are a leather-feeding and backing-up surface which affords support to the leather at the extreme edge of the latter, a burnishing tool having an edge-burnishing surface which crosses the plane of the leather and acts upon the leather edge immediately at the edge of the feeding and backing-up surface, and means coacting with said surface to grasp the leather at its edge while being acted upon by the said edgeburnishing surface. Other important features are a creasing or displacing portion of the tool that is opposed to the said surface, and a margin-burnishing surface connecting said creasing'and displacing portion with said edge-burnishing surface, and also opposed to the said feeding and backing'up surface. The invention includes other special features, including certain thereof having relation to the feeding and backing-up means, to which reference is made in the following detailed description of the illustrative embodiment of the invention that is shown in the drawings, further reference thereto being made in the claims appended hereto.

The illustrative embodiment aforesaid comprises an organized machine containing a rotary burnishing tool. The invention, except as definitely restricted by the terms of'particular claims, is not necessarily limited in all instances to the employment of a rotary tool, other types of tools being known in the art, and being capable of adaptation to the general purposes of the present invention by those skilled in the art.

In the drawings,-

Figure 1 is a side elevation of the illustrative embodiment aforesaid.

Fig. 2 is a plan view thereof, with the presser omitted.

Fig. 3 is an elevation of the front end of the said embodiment, with the presser omitted.

Fig. 4 is a front elevation, on a relatively enlarged scale, of the machine parts which are concerned more immediately in supporting, backing-up, guiding, creasing and burnishing the leather operated upon.

Fig. 5 is a view on a still larger scale, than Fig. i, of certain of the parts shown in Fig. 4, representing the latter mostly in vertical section, with a piece of leather in place and being operated upon.

Fig. 6 is a plan View, on the same scale as Fig. 5, of a portion of the feeding and backing-up annulus, showing also the radial portion of the tool, and the adjacent edgeguide for the leather, in horizontal section in the plane indicated by line 66 in Fig. 5, the piece of leather being omitted.

I regard the failure of prior machines and devices designed for burnishing the cut edges of upper leather, and other thin and flexible leather, as owing to the improper direction and manner in which the burnishing tool has acted against the leather edge, and

to the lack of proper and competent means,

for presenting the said edge to the action of the tool and at the same time controlling the edge while undergoing the burnishing operation. Particular aims of the invention are to remedy the deficiencies in these respects.

In the illustrative embodiment shown in the drawings, the leather-feeding and backing-up surface is constituted by the top face of an annulus 1. The said annulus is mounted by means of a hub-portion 1 upon a nearly upright shaft 1" that is journaled in bearings 1, 1% in connection with a supporting mounting 1 that is applied to the machine-frame. It is driven for the purpose of effecting the feed by means of drivingconnections comprising a bevel-gear that is fixed upon the shaft 1", and a bevel-pinion 1 that is fixed upon a shaft 1 mounted in bearings in the said supporting mounting 1 and provided at its rear end with a pulley 1 to which in practice is applied a driving band (not shown) through which the shaft and the annulus are actuated.

The burnishing tool 2, in this instance a rotary tool as aforesaid, is mounted upon the forward end of a shaft 3 that is driven by means of an electric motor 3 mounted upon the standard 3. By means of the said motor the tool is rotated at a high rate of speed. The tool is related to the said leather-feeding and backingup surface as shown best in Fig. 5, namely, being located at the inner periphery of the annulus, with its edge-burnishing portion, 2", projecting into the opening of the annulus immediately at the said inner periphery. To enable the annulus to clear the supporting bearing for leather-feeding and backing-up surface of the annulus 1. The said burnishing surface Q 1s, as indicated 111 Fig. 5, a peripheral portlon of the tool that is adapted to operate upon the marginal face of a piece ofleather a which is backed-up by the surface of the annulus. It makes contact with th said marginal face immediately at and adjoining the said inner periphery, or edge of the annulus, and coacts with such face to squeeze and hold the entire thickness of the leather to the extreme edge of the latter, as in a vise, while the portion 2 of the tool is acting upon the edge. In addition, the surface Et -operates to burnish the marginal face of the leather. The burnishing surface of the tool-portion 2" projecting into the opening of the annulus is shown as curved to conform to the curvature of the periphery of the annulus, which is the preferred form, and the said surface is fitted snugly to the said inner periphery as indicated in Fig. 6 so that no break or opening exists between them into which portions or fibers of the cut leather-edge could enter. Hence the surface of the annulus sustains the margin or edge-portions of the leather completely up to the edge-burnishing surface of the portion 2 of the tool. At 2 is the creasing or displacing portion of the tool, it being constituted by a prominent circumferential portion or edge alongside the burnishing surface 2. As stated hereinbe fore and as shown in Fig.5, the burnishing surface 2 of the tool connects said creasing or displacing portion of the tool with the edge-burnishing surface.

At 3 is a combined shield or guard and edge-guide fitting at one edge thereof close to the outer edge of the radial flange of the tool, as indicated best in Figs. at and 6, and with its lower end entered into the opening of the annulus close to the inner periphery of the latter as indicated in Fig. 6. The member 3 extends downward from the front end of a forwardly projecting pin 3" carried by an upstanding arm 1 of the mounting 1 aforesaid.

The piece of leather to be operated upon having been applied to the surface of the annular work-support and backing 1, with its edge pressed up against the surface of the combined shield or guard or guide 3 and against the substantially radial burnishing surface of portion 2* of the tool, and the leather being advanced by turning more ment of the said work-support and backing so as to carry the leading portion of the leather under the overhanging peripheral portion of the tool, the portion 2 of the tool forms a longitudinal depression or crease in the face of the leather-margin, at the same time displacing some of the substance of the leather so as to crowd the marginal and elge portions of the leather against the burnishing surfaces 2* and 2 of 1 the-tool. In consequence, the said portions of the leather are compressed somewhat and the effect of the burnishing action upon the marginal face and extreme edge of the leather, as well as the appearance of the margin and edge, are very much improved.

A presser-wheel 4: is shown in Figs. 1 and 5 mounted in position to make contact with the upper surface of the piece of leather a in line with the place at which the creasing, displacing, and burnishing action takes place. This presser-wheel is pivoted upon the lower portion of a supporting-bar a that is attached to the forward extremity of a carrier-lever 4", the said carrier-lever in its turn being mounted by means of pivotscrews f", a, upon the upper portion of arm 1 of mounting 1, said carrier-lever being acted upon by an expanding spiral spring st Fig. 1, by means of which the presserwheel is actuated toward the surface of the annulus with yielding force.

At 5 is a small table arranged alongside the annulus 1 to afford support in front of the said annulus to the leather while being operated upon.

The annulus 1 is mounted with capacity for such adjustments thereof as may be required to suit different thicknesses of leather, and to place the inner periphery thereof in proper working relation to the radial burnishing surface of portion 2 of the tool. To permit of shifting the surface of the annulus toward or from the creasing portion 2 and adjacent peripheral surface 2 of the tool, the annulus is made adjustable toward and from the axis of the tool by supporting the mounting 1 by means of pivotal screw centers 1, 1*, at its rear end in connection with an arm 3 projecting from standard 3, so that the mounting is capable of being swung in a vertical plane. The forward portion of the mounting rests upon an adjusting screw 1 applied to a threaded hole in the bed-plate 1 of the machine-frame. Said screw is furnished with a knurled flange 1 for convenience in turning the same in making ad ustments of the mounting and annulus toward and from the axis of the tool, and with a lock-nut 1 to prevent accidental loss of adjustment. Transverse shift of the mounting and annulus may be effected by turning the center screws 1, 1 To enable the annulus to be adjusted in the direction of the length of the axis of the tool, that is to say, radially of the annulus, the mounting 1 is made adjustable in such direction by constructing its rear end-portion with a hollow shell 1 and combining therewith a cylindrical member 1 (shown by dotted lines in Figs. and 2) fitting within the shell and having in its opposite ends conical sockets receiving theengaging ends of the center-screws, with the said conical sockets out of center with relation to the axis of member 1 The member 1 is held from accidental turning within the shell 1 by compressing the latter upon the exterior of said member, for which purpose the shell is split for a portion of its length at 1 and furnished with a tightening screw 1 by means of which it may be contracted upon the member 1 Member 1 is in effect an eccentric, and by rotatively adjusting it within the shell 1 adjustment of the annulus in the direction of the length of the axis of the tool may be effected. The

casing of motor 3 is attached to standard 3 by a central bolt 3 and nut or nuts 3, permitting the motor, its shaft, and the tool to be swung around the axis of said bolt 3 so as to effect any required transverse angular adjustment of the tool-shaft and tool.

By placing the tool at the inside of the annular work-feeding and backing-up surface, against the inner periphery of the latter and shaping the tool to conform to the said inner periphery, I prevent any portions of the leather from being bent down alongside the edge of said surface by the action of the tool. Hence the back of the leather lies flat at the leathers edge, and is kept fiat. The guide 3 acts as a guard or shield which prevents theleather from being pushed forward by the operator past the radial portion 2" of the tool, so as to lap past the outer edge of the said portion.

A machine constructed in conformity with the invention produces a finished edge that is smooth from the front to the back of the leather. In the operation of the'tool, its edge-burnishing surface carries the fibers toward the back of the leather, in the plane of the leathers edge.

In order to improve the appearance of the burnished edge of the leather by backingoff or working under the lower angle of said edge, the acting face of the work-support and the acting surface of the edge-burnishing portion of the tool are inclined relative to each other as in Fig. 5. This relation is shown as attained by inclining the acting face of the work-support upward and rearward with respect to the axis of the tool, and this in turn is shown as attained by forming the annulus as a frustunrof a cone.

Various minor changes may be made in the essential parts, and the general construction of the machine may be altered or re-designed, without entailing any departure from the principles of the invention. Some of the features may be employed without the remainder, within the scope of claims made hereinafter.

It will be perceived that my invention includes as a part thereof a new method of burnishing the edge of upper leather and the like, consisting in clamping the leather firmly at the edge thereof, and while hold ing the same compressed in the direction of its thickness subjecting the said edge to a burnishing action which carries the fibers toward the back of the leather in the plane of the edge.

What is claimed is 2- 1. Leather-edge burnishing devices comprising a feeding and backing-up surface, and a burnishing tool having a creasing and displacing portion opposed to the said surface, an edge-burnishing surface, and a burnishing surface connecting said creasing and displacing portion with said edge-burnishing surface and also opposed to the said feeding and backing-up surface.

2-. Leather-edge burnishing devices comprising a feeding and backing-up surface, a presser which coacts with said surface in controlling and feeding the leather while being operated upon, and a burnishing tool having a creasing and displacing portion opposed to the said surface, an edge-burnishing suriace, and a burnishing surface, connecting said creasing and displacing portion with said edgeburnishing surface and also opposed to the said feeding and backing-up surface. 7

3. Leather-edge burnishing devices comprising a feeding and backing-up surface, and a rotary burnishing tool having a creasiung and displacing portion opposed to the said surface, a radial edge-burnishing surface, and a burnishing surface connecting said creasing and displacing portion with said edge-burnishing surface and also opposed to the said feeding and backing-up surface.

4L. Leather-edge burnishing devices comprising a feeding and backing-up surface, a presser which coacts with said surface in controlling and feeding the leather while being operated upon, and a rotary burnishing tool having a creasing and displacing portion opposed to the said surface, a radial edge-burnishing surface, and a burnishing surface connecting said creasing and displacing portion with said edge-burnishing surface and also opposed to the said feeding and backing-up surface.

5. Leather-edge burnishing devices comprising a feeding and backing-up surface, and a burnishing tool having a burnishing surface opposed to" the said feeding and backing-up surface and adapted to operate upon the marginal face of a piece of leather a presser which coacts'with said surface in' controlling and feeding the leather while being operated upon, and a burnishing tool having a burnishing surface opposed to the said feeding and backing-up surface and adapted to operate upon the marginal face I of a piece of leather backed up by the latter surface, and having also an edge-burnishing surface acting upon the leather edge immediately at the edge of said feeding and backing-up surface.

7. Leather-edge burnishing devices comprising a feeding and backing-up surface, and a rotary burnishing tool having a burnishing surface opposed to the said feeding and backing-up surface and adapted to operate upon the marginal face of a piece of leather backed up by the latter surface, and having also an edge-burnishing surface acting upon the leather edge immediately at the edge of said feeding and backing-up surface.

8. Leather-edge burnishing devices comprising a feeding and backing-up surface, a presser which coacts with said surface in controlling and feeding the leather while being operated upon, and a rotary burnishing tool having a burnishing surface 0pposed to the said feeding and backing-up surface and adapted to operate upon the marginal face of apiece of leather backed up by. the latter surface, and having also an edge-burnishing surface acting upon the leather edge immediately at the edge of said backing-up surface. v

9. Leather-edge burnishing devices com prising a revolving annular work-support, and a burnishing tool having an edge-burnishing portion projecting within the opening of the annulus immediately adjacent the inner periphery ofthe latter, shaped to conform to said inner periphery, and working against the leather edge at such periphery, the said tool having also a burnishing portion opposed to the face of the work-support and adapted to act upon the marginal face of a piece of leather backed up thereby.

10. Leather-edge burnishing devices comprising a revolving annular Work-support, a presser which coacts with said surface in controlling and feeding the leather while being operated upon, and a burnishing tool having an edge-burnishing portion projecting within the opening of the annulus immediately adjacent the inner periphery of the latter, shaped to conform to said inner periphery, and working against the leather edge at such periphery, the said tool having also a burnishing portion opposed to the face of the work-support and adapted to act upon the marginal face of a piece of leather backed up thereby.

11. Leatheredge burnishing devices comprising a revolving annular work-support, and a rotary burnishing tool having a radially extending edge-burnishing surface projecting within the opening of the annulus immediately adjacent the inner periphery of the latter, shaped to conform to said inner periphery and working against the leather ed e of such periphery, the said tool having also a peripheral burnishing surface opposed to the face of the worksupport and adapted to act upon the marginal face of a piece of leather backed up thereby.

12. Leather-edge burnishing devices comprising a revolving annular work-support, a presser which coacts with said surface in controlling and feeding the leather while being operated upon, and a rotary burnishing tool having a radially-extending edge burnishing surface projecting within the opening of the annulus immediately adjacent the inner periphery of the latter, shaped to conform to said inner periphery and working against the leather edge of such periphery, the said tool having also a peripheral burnishing surface opposed to the face of the work-support and adapted to act upon the marginal face of a piece of leather backed up thereby.

l3. Leathenedge burnishing devices comprising a revolving annular work-support, and a burnishing tool having an edge-burnishing portion projecting within the opening of the annulus immediately adjacent the inner periphery of the latter, shaped to conform to said inner periphery, and working against the'leather edge at such periphery, the said tool having a creasing and dis placing portion and marginal face burnishing surface both opposing the working face of said annular work-support.

l4. Leather-edge burnishing devices comprising a revolving annular work-support, a presser which coacts with said surface in controlling and feeding the leather while being operated upon, and a burnishing tool having an edge-burnishing portion projecting within the opening of the annulus immediately adjacent the inner periphery of the latter, shaped to conform to. said inner periphery, and working against the leather edge at such periphery, the said tool having a creasing and displacing portion and marginal face burnishing surface both opposing the working face of said annular work-suport. r a

15. Leather-edge burnishing devices comprising a revolving annular work-support, and a rotary burnishing tool having a radial burnishing portion projecting within the opening of the annulus immediately adjacent the inner periphery of the latter, shaped to conform to said inner periphery, and working against the leather edge at such periphery, the said tool having a creasing and displacing portion and marginal-face burnishing surface both opposing the working face of said annular work-support.

16. Leather-edge burnishing devices comprising a revolving annular work-support, a presser which coacts with said surface in controlling and feeding the leather while being operated upon, and a rotary burnishing tool having a radial burnishing portion projecting within the opening of the annulus immediately adjacent the inner periphery of the latter, shaped to conform to said inner periphery, and working against the leather edge at such periphery, the said tool having a creasing and displacing portion and marginal-face burnishing surface both opposing the working face of said annular work-support.

17 Leather-edge burnishing devices comprising a revolving annular work-backing, and a burnishing tool having an edge-burnishing portion projecting within the opening of the annulus at the inner periphery of the latter and working against the leather edge at such periphery.

18. Leather-edge burnishing devices comprising a revolving annular work-backing, and a rotary burnishing tool having an edgeburnishing portion projecting within the opening of the annulus atthe inner periphery of the latter and working against the leather edge at such periphery.

19. Leather-edge burnishing devices comprising a revolving annular work-backing, and a burnishing tool having an edge-burnishing portion projecting within the opening of the annulus at the inner periphery of the latter and working against the leather edge at such periphery, the said tool having also a burnishing portion opposed to the face of the annulus and adapted to act upon the marginal face of a piece of leather backed up thereby.

20. Leather-edge burnishing devices comprising a revolving annular work-backing, and a rotary burnishing tool having an edgeburnishing portion projecting within the opening of the annulus at the inner periphery of the latter and working against the leather edge at such periphery, the said tool having also. a burnishing portion opposed to the face of the annulus and adapted to act upon the marginal face of a piece of leather backed-up thereby.

21. Leather-edge burnishing devices comprising a feeding and backing-up surface which afiords support to the leather at the extreme edge of the latter, having a rate of movement less than'that of the edge-burnishing surface, means coacting with. said first surface to grasp the leather at said edge, and

an edge-burnishing surface crossing the plane of the leather and that of the feeding and backing-up surface immediately at the edge of the latter surface.

22. Leather-edge burnishing devices comprising an annular work-backing, and a burnishing tool having an edge-burnishing portion projecting within the opening of the annulus, shaped to conform to the inner periphery of the annulus, and working against the leather edge at such periphery.

23. Leather-edge burnishing devices comprising an annular work-backing, and a rotary burnishing tool having an edge-burnishing portion projecting within the opening of the annulus, shaped to conform to the inner periphery of the annulus, and working against the leather edge at such periphery.

24,-. Leather-edge burnishing devices comprising a work-supporting and feeding surface, and a rotary burnishing tool having a portion opposed to said surface and acting to burnish the marginal face of the leather, and an edge-burnishing portion extending alongside the edge of such surface, with the said surface and the said edge-burnishing portion relatively inclined to cause the lower angle of the leather-edge to be backed-off or worked under by the burnishing action.

25. Leather-edge burnishing devices comprising an annular work-feeding and supporting surface, and a rotary burnisher having a radial edge-burnishing surface .conforming to and in proximity to the inner periphery of the annulus, said burnishcr also having a burnishing surface opposed to said annular support and acting upon the marginal face of the leather, with the said worle feeding and supporting surface inclined relative to the axis of the burnisher to cause the lower angle of the leather-edge to be backed-off or worked under by the burnishing action.

26. Leather-edge burnishing devices comprising a work-support, and a burnishing tool having a portion opposed to the face of said work-support, to burnish the marginal face of the leather, and also having an edge-burnishing portion extending alongside the ct ge of the work-support, with the acting face of the work-support andthe acting surface of the edge-burnishing portion of the tool arranged in an angular relation to each other causing the lower angle of the leather-edge to be backed-off or worked under by the burnishing action.

27. Leather-edge burnishing devices comprising a revolving annular work-support, and a burnishing tool having a portion opposed to said work-support and acting to burnish the marginal face of the leather, and also having an edge-burnishing portion extending alongside the inner edge of the work-support and entering the opening thereof, with the acting face of the worksupport and the acting surface of the edgeburnishing portion ofthe tool inclined relative to each other to cause the lower angle of the leather-edge to be backed-off or worked under by the burnishing action.

28. Burnishing devices comprising a conical annular work-backing and feeding support, and a burnishing tool having a burnishing portion opposed to the conical face of the said support and adaptedto operate upon the marginal face of apiece of leather backed up thereby, said tool having also an edge-burnishing portion projecting within the annular support immediately at the inner periphery of the latter, and acting upon the leather edge at an inclination so as to cause the lower angle of the leather edge to be backed-off or worked under by the burnishing action.

29. Burnishing devices comprising a conical annular work-backing and feeding support, and a rotary burnishing tool having a periphery acting burnishing surface opposed to the conical face of the said support, and adapted to operate upon the marginal face of a piece of leather backed up thereby, said tool having also a radial edge-burnishing portion projecting within the innerperiphery of the latter and acting upon the leather edge at an inclination so as to cause the lower angle of the leather edge to be backed-off or worked under by the burnishing action.

30. Burnishing devices comprising a conical annular work-backing and feeding support, a presser cooperating with the conical face of said support, and a rotary burnishing tool having a peripherally acting burnishing surface opposed to the conical face of the said support, and adapted to operate upon the marginal face of a piece of leather backed-up thereby, said tool having also a radial edge-burnishing portion projecting within the inner periphery of the latter and acting upon the leather edge at .an inclination so as to cause the lower angle of the leather edge to be backed-off or worked under by the burnishing action.

31. The method of burnishing the edge of upper leather and the like which consists in clamping the leather firmly at the edge thereof and while holding the same compressed in the direction of its thickness subjecting the said edge to a burnishing action which carries the fibers toward the back of the leather in the plane of the edge.

32. Leather-edge burnishing devices comprising a feeding and backing-up annulus, an edge-burnishing tool working at the inner periphery of the said annulus, a supporting. mounting for said annulus, and means to adjust the said mounting and annulus for different thicknesses of leather.

33. Leather-edge burnishing devices comprising a feeding and backing-up annulus,

an edge-burnishing tool working at the inner periphery of the said annulus, a supporting mounting for said annulus, and means to adjust the mounting and annulus radially of the latter with reference to the tool.

34. Leather-edge burnishing devices comprising a feeding and backing-up annulus, an edge-burnishing tool working at the inner periphery of said annulus, a supporting mounting for the annulus, and devices for adjusting the said mounting and annulus for difierent thicknesses of leather and also radially of the annulus with reference to the tool.

35. Leather-edge burnishing devices comprising a feeding and backing-up annulus, an edge-burnishing tool working at the inner periphery of the said annulus, a pivotally-hun'g supporting mounting for the an nulus, and means to adjust the said mounting around its pivotal axis and thereby adjust the annulus toward or from the tool Y for different thicknesses of leather.

36. Leather-edge burnishing devices cornprising a feeding and backing-up annulus, an edge-burnishing tool working at the inner periphery of the said annulus, a supporting mounting for the annulus, and an eccentric hanging for said mounting ad justahle to adjust the annulus radially with relation to the tool.

37. Leather-edge burnishing devices coinprising a feeding and backing-up annulus, an edge-burnishing tool working at the inner periphery of the said annulus, a supporting mounting for the annulus, an eocentric hanging for said mounting adjustable to adjust the annulus radially with relation to the tool, and means to adjust the mounting and annulus toward or from the tool for different thicknesses of leather.

In testimony whereof I aflix my signature in presence of two Witnesses.

- FRANK W. MERRICK. WVitnessees NATHAN B. DAY, CHAS. F. RANDALL. 

